Filter



UNITED STATES PATENT CFFICE.

IVM. W. AYRES, OF WORCESTER, MASSACHUSETTS.

FILTER.

Specification of Letters Patent No. 18,031, dated August 25, 1857.

To all whom t may concern:

Be it known that I, WVM. W. Armas, of lVorcester, in the county of lVorcester and State of Massachusetts, have invented a new and useful Improvement in Filters; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawing7 forming part of this specification, in whichg Figure l is a section through axis of filter, showing the position for filtering the fluid from the center outward. Fig. f2 is a similar section with parts arranged for filtering from the exterior.

Similar characters of reference denote the same part.

This filter is designed to be attached to the discharge pipe of a hydrant, and -is so constructed that by a simple movement of a central spindle, the fluid may be forced through the filtering medium from either side thereof, in order to cleanse the said medium when by continued use it becomes clogged; my invention consisting in the peculiar combination of devices hereinafter to be set forth for accomplishing that object.

In the drawing C is the exterior casing attached to the discharge pipe of the hydrant by screw a. B is the inner cylinder with perforations b, and covered by the filtering medium c. This cylinder is closed at its ends by heads 7L h.

Running longitudinally through the cylinder C, is the central spindle S, all its joints having a close contact. In the head of this spindle is a cavity d with an opening e in the side thereof. The bottom of the spindle has a cavity f and an opening g on the same side as opening e.

The heads L h', have the channels m n, Am n", communicating on opposite sides with the inner cylinder, and with the space between the cylinders B and C, as shown in the drawing. The mouths of these passages are so placed that they may be made to coincide with the openings e g in the spindle, by the turning of the spindle. These passages and openings act as shown in the drawing. In Fig. l the fluid passes to the interior of cylinder B and is filtered and discharged as shown by arrows. By turning the spindle 180O the action of the water will be to remove the impurities adhering to the filtering medium and carry them off as shown by arrows in Fig. 2.

I claim-- The combination of cylinders B and C with the spindle S, when constructed with reception and discharge cavities d f, openings c g, and channels m, n, m, n', arranged and operating substantially as and for the purposes set forth.

In testimony whereof, I have hereunto signed my name before two subscribing witnesses.

WM. W. AYRES.

Witnesses:

WVM. R. FISHER, J. HENRY HILL. 

